Printing plate



Patented Oct. 27, 1931' UNITED STATES 'PATENT OFFICE HANS :Epsom/TANN, or srEr'rIN, GERMANY rnINfrrNG PLATE Application iiJed June 24, y1929, Serial No. 373,480, and in. Germany July 21, V1928.

The-invention relates'to the mounting of metal printing plates in rotary relief print.

ing machines and flat bed relief printing presses. According` to the invention the printing member or clich inserted '1n the holder or plate is secured within a few sec' onds by placing a thin rubber or gutta-percha sheet between these two parts and vulcanizing the same. Such sheets have a more uniform cross section than applied adheslve materials, and are rendered insensitive to water and other effects by the vulcanization.

The invention is illustrated by way of example on the accompanying drawing, whlch is a cross-sectional view of a portion of a printing cylinder showing the invention.

The printing cylinder a' is provided with uitable recess in its periphery in which the thin vulcanizable material, such as rubber or gutta-percha sheet b', is provided and having thereon the printing plate, clich or stereotype plate c.

What I claim is 1. A device for securing a printing plate to a cylinder or fiat bed of a printing machine, comprising a sheet of vulcanizable material interposed between the cylinder and A the printing plate, said sheet being vulcanized to the cylinder or bed and the plate.

F 2. A device for securing a printing plate to a cylinder or fiat bed of a printing machine comprising a rubber sheet interposed between the cylinder and the printing plate,

said sheetbelng vulcanized to the cylinder or bed and the late.

3. A device or securing a printing plate to a cylinder or Hat bed of a printin 'machine comprisin a gutta-percha sheet interposed between t e cylinder and the printing 0 plate, said sheet being vulcanized to the cylinder or bed and the late. 4. The method ofp securing metal printin plates in rotary relief printing machines and flat bed relief printing presses, which consists in interposing a thin sheet of material between the cylinder or llat bed of the printing machine and the plate and vulcanizing the material to the cylinder or bed and the plate.

' HANS BUSOHMANN. 

